01. SIM Cards

Simply choose the data plan based on your estimated data usage. Once purchased your SIM and secure activation instructions will be sent to you by post with instructions also sent via email.

Ensure you have your SIM card and the packaging it was provided in at hand. Simply click the Register Your SIM on our home page and follow the onscreen instructions.

All orders are dispatched either the dame day or next working day via first class mail. Please allow for 1-3 working days for delivery.

The ICCID is your SIM identification number. You will need this to register and activate the SIM card. It is found printed on the back of the SIM card and begins with the numbers 8988303...

You should log into your account immediately and click on the 'Bar SIM' button and activate the 'lost' or 'stolen' option. Alternatively you can contact us via our web contact form or live web-chat and we can help. It is particularly important to do this if you have auto-payments set up.

All orders are dispatched either the dame day or next working day via first class mail. Please allow for 1-3 working days for delivery.

02. Data Boosts

Data boosts are only available to purchase if you are on the highest data plan, therefore unable to upgrade, but you still need more data to get you to the end of the month.

You can then buy a Data Boost which will give you another 1GB of data to use until you are next billed for your data plan. If you need more, simply buy another one.

Each data boost you purchase will last until your current month’s billing date.

If your data boost is running out, simply purchase another one to get you through to your billing date. We continually monitor our customer’s data usage and we will introduce bigger data plans if customers require multiple data boosts.

03. Pre-Sales

No, currently our SIMs will only work across all UK networks and will not work overseas outside the UK.

When you purchase your SIM data plan, you will set up a GM Data Sims account. Simply log in to see your dashboard where you can see your usage, manage notifications/reminders, upgrades, downgrades, invoices and more.

We are a small UK company with UK based support available via Web Chat or email via our Contact Form. We also offer call back telephone support via our Contact Form requests.

No, these SIMs are data only, designed for security cameras, trackers, 4g entry systems etc. You will not be able to make calls or send SMS texts with our SIMs.

All our SIMs  scan all 4 major UK networks (EE, O2, Voda and Three) and automatically connect to the strongest signal available at no extra cost, giving  the best possible coverage wherever you are.

Simply choose the data plan based on your estimated data usage. Once purchased your SIM and secure activation instructions will be sent to you by post with instructions also sent via email.

There are no contracts or tie-ins with our SIM plans. You simply choose your monthly data plan and pay for the upcoming 30 days. You can upgrade any time, downgrade for next month or cancel any time. When your SIM is first registered/activated, we allow you to use your chosen data allowance until the end of the next calendar month. We then charge your payment method in advance for each upcoming month a few days before the new the new month begins.

We will notify you by email when your data is getting low. You can also check in your account area.

You can then upgrade to a higher data plan for the remainder of the month.

You will only pay the difference between the plan you purchased and the cost of the upgraded plan for the current month.

If there is no higher plan available, you can purchase a ‘Data Boost’ in 1GB units which can only be used until the end of the current calendar month.

You can always ensure you are set for us to take ‘auto-payments’, allowing us to upgrade your account accordingly so you never lose connection.

You pre-purchase the data plan you think you need for each calendar month.

When your SIM is first registered/activated, we allow you to use your chosen data allowance until the end of the next calendar month.

We then charge your payment method in advance for each upcoming month a few days before the new the new month begins.

If you’re not sure how much data you will use, purchase a 1GB plan. If you are running out of data within the term, simply upgrade to the next plan E.g. 3GB. Don’t worry though, when you upgrade, we’ll only charge you for the difference between the 1GB and 3GB plan.

You pre-purchase the data plan you think you need for each calendar month.

When your SIM is first registered/activated, we allow you to use your chosen data allowance until the end of the next calendar month.

We then charge your payment method in advance for each upcoming month a few days before the new the new month begins.

04. Upgrades

We will notify you by email when your data is getting low. You can also check in your account area.

Log in to your account where you can upgrade to a higher data plan for the remainder of the month.

You will only pay the difference between what you paid for your current  plan and the cost of the upgraded plan for the current month.

If there is no higher plan available, you can purchase a ‘Data Boost’ in 1GB units which can only be used until the end of the current calendar month.


For simplicity, you can change your setting allowing us to take ‘auto-payments’ to upgrade your account accordingly so you never lose connection.

05. Downgrades

If you feel you are using very little data, you may want to downgrade your plan for the next month.

Simply log in to your account area where you can find how to downgrade your plan.

Please note, downgrades will only be activated on the next billing date, for the next calendar month.

06. Cancelation

Simply log into your account area where you can find how to cancel your SIM card agreement. Please note, no refund is given for unused data from cancelation for the remainder of the purchased billing term.

07. Billing

As there is no contract, data is pre-purchased for the upcoming calendar month a few days before the start of the new calendar month. Billing occurs every month on the stipulated date.

As we bill in advance for each calendar month, we offer all our customers an extended period for every newly registered SIM card, allowing you to use your data until the end of the next calendar month following registration (billing day of the next calendar month). This helps customers who register later in the month have a reasonable time to use their data and assess which package is right for them.

Payment is taken when a SIM card is purchased off our website at the advertised price for the data plan chosen.

Following registration of the SIM on our web portal, the SIM is live and good to use in your device.

We will ask for payment every time a new month’s billing data approaches, or when you have nearly used the data allowance on your chosen package.

No problem. You simply upgrade to a higher plan which will give you more data until the end of the month. For example, if you are on a 1GB plan and are running out of data mid-month, then you would upgrade to the 3GB plan. Don’t worry though, we will only charge you the difference of the 1GB package you have already paid and the price of the higher plan. You can always downgrade again for the start of the next billing month.

Simply upgrade your plan when you are ready and downgrade again when you need less data. You can do this month on month from your account area.

No, you can only upgrade mid-month if you need more data. If you downgrade, this will register for the following month and you will remain on your current plan for the remainder of the term.

Yes, we understand some customers may only require their 4G devices for certain months, E.g. cameras for lambing and calving. If you do not pay for your upcoming month, the service will stop. When you want to your SIM live again, simply go into your account area and pay for your plan and the SIM will go live again. Please note, if payment is not received for 12 months, the SIM card will become invalid and  a new SIM card will need to be purchased.

No problem. You can simply purchase a ‘Data Boost’ which will give you an additional 1GB of data to get you through to the end of your billing month. If your ‘Data Boost’ runs out, simply purchase another one.